I don't know where Phaestus got his graph, but in all comparisons I saw (with the graphs from BillA) , the MCP600 was on par with a Eheim 1048 (in fact slightly better than a Eheim 1048).
See also
http://forums.overclockers.com.au/sh...ghlight=mcp600
When you look at the PQ curves of the 1250 and the MCP600 you can clearly see that the 1250 outperforms the MCP600 except at very high restrictions, but not by much...
So, no question of a MCP600 for me, but maybe a MCP1200...
This is why I was so excited about the CO30P5: more head and greater flow than a 1250 for only 29.95$ (I paid 80$ for my 1250 a few years ago).
CD